How can you predict the directions and amounts of squirt, swerve, and throw with various types of shots?
I ve gotten several e-mail questions concerning Diagram 3 in my August ’07 article. Here’s the diagram: Several people have suggested the throw direction is wrong due to collision- or cut-induced throw (CIT). Before giving you my answer, think about it yourself and decide if you think the diagram is correct or not. Also, many people seem to be confused by the real effects of squirt and swerve. I think Diagram 4 from the article (see below) helps clarify things. I use the phrase “effective squirt” for the net effect of squirt and swerve. Some people like to call this “squerve.” My series of articles on squirt covers all of the details of squir and swerve. Now back to Diagram 3. Throw direction depends on the direction of the relative motion of the surface of the cue ball in contact with the object ball. This direction is affected by both cut angle and spin. I think my January ’07 and February ’07 articles illustrate the different possibilities quite well. Please refer to them. I think t
